Automatic motor cut-out.



PATENTED APR. 16, 1907.

F. E. CASE.

AUTOMATIC MOTOR GUT-OUT.

APPLTOATIGN FILED JULY 18, 1906,

UNITED STATES PATENTNOFFICE;

FRANK E. CASE, OF SCHEN'ECTADY, NEW YORK, ASSIGNOR TO ELECTRIC COMPANY, A CORRORATION OF NEW YORK,

AUTOMATIC moron ou'r-ou'r zen of the United States, residing at Schenec== tady, in the county of Schenectady and State of New York, have invented certain new and useful Improvements in Automatic Mo tor Cut-Outs, of which the following is a specification.

It is usual in four-motor car or locomotive equipments to connect 'the motors in two permanent groups, each containing two motors in parallel. In starting the car or locomotive these two groups are first connected in series and then in parallel; When individual fuses are used for the different motors in such equipments, the blowing of the fuse of one motor will cut out that motor alone, thus giving rise to a condition wherein in starting and while the controller is in the series positions a single motor is connected in series with two motors arrange-din parallel, making it necessary for the motorman to remove another fuse or otherwise change the circuit connections so as to cut out the corresponding motor of the other -'group. .This

- operation of course involves. time, and if group or groups.

he lected causes trouble,

The object of the present invention is to provide means ,where acter described the blowing of the fuse of one, motor automatically effects the cutting out of the corresponding motor of the other In the accompanying drawings I have shown diagrammatically a four-motor-car equipment having associated therewith .a well-known type of controller and cut-out devices arranged in accordance with the present invention.

- Reference beinghad to the drawings,

M M M indicate the four motors. C'is a-c ontroller for connecting the motors with source of supply L in twogroups, consisting, respective'ly, of motors M M, and M M, connected first in series and then in parallel and for va in the amount of resistance R in circuit wit t e motors. D is a reversing-switch .lor changing the relative connections of the hold and armature windings in order-to pro duce" reversal of the -motors. These elemerits may'take any usual or desired forms,

the particular forms illustrated being simply indicative of apparatus ordinarily used.

Specification of Letters Patent.

application filed July 18,

yin a system in chaI- Patented April 16, 1907.

1906. Serial in 320,708.

1, 2, 3, and4'are fuses arranged circuits ofthe motors M, M, M, and M, re+

'- *-spe'ctively. 5 and 6 are cut-out switches switch 5 bein adapted to '0 en the circuit 0 motors M an M, and switc 6 bein ada ted to open circuit of motor M andlt". hu's, when one of the cut-outs is open corresponds 6oing motors in the groups are eliminated, the two remaining motors being then connected in series and in parallel by turning the con.-

} troller in the normal way. These cut-out I switchesare illustrated as each having three '6 5 poles 7, 8, and 9, and as bein provided with '1 a spring 10, which tends to hold the switch ,Ll it ishe d cljosed by acatch 12.

Referring to-switch 5, 13 is an electromagnet in shunt to fuse 2, so thatwhen this fuse blows the motor-current passes through coil The spring then opens the switch and'the '75 circuits of both motors M and M are interrupted. 14 is atri pin device for catch 12 controlled by an e ectroma'gnet 15, -the-c.oi of this electroma net bein shunt to the'fuse be tripped andfthe cut-out-switch opened, eliminating motors M and M, as before. The controllin means for switch 6 is the same as that. for t e other switch, the coils 13 and '4, res ectively. The blowing of either of these s effects the opening ofthec'ut-out switch 6 in the same mannerfthatctheother switch is opened upon-the,,b i owing of fuses 10ft 2-. :w-z, i

.It will of course be understood that my invention 'is not limited tothe ;p'arti culai- .,form of cut-out switch or controlling means therefor shown. sincethese'devices-may bechanged L. various ways without'departing from the scope of my invention. What I claim as new, and desire to secure. by Letters Patent of the United States, is 1. Int; motor-control system, {plurality- 0 en normally. After t ehsmlghlifimbeen c osed as, f ymean'sof haiTdTe-kr of the electromagnet and releases the catch."

51, so that when t is fuse b owe the catch will 8o i 15 being in this'ca'se in shun-t 'to'fuse's '3' and of. groups of motors, an automaticgutsout do? i199 each motor, and means for'autometically disconnecting corresponding motors fronrseid groups when/one of t hed'useshlows.

- 3. In a motor-control. system, plurality of groups of motors,,cu[-uutsiwiichw for said 1notors,fuses in the motorcircuits, and 11mins for 0 erating-said switches to out out oorrcs on ing motors from, said groups when one 0 the fuses blows.

' 4. In a motor-control system, ii plurality of groups of motors, fuses in thc motor-ole cults, and means for cutting out corresponding motors from said groups when any one ol' the fuses 'blow's.

5. In a motor-control systcnl, a plurality .of groups of motors, an autonuitic cut-outdo- -Vl0e 8iSSOGlH,t6(l with each ,motor for opening ranged tip cut out corresponding motors from said groups and electrorespoi'isive devices ar ranged Iu'shu'nt to said fuses for causing the operatlon' of one of the cut-outswltch mechanismsupon the blowing of the fuse in the circuit of one of the iriotors aflected by said "latter switch mechanism. 4 v

7. in a motor-control system, a plurality cl grou )H of motorseach comprising a plurzi lit'y oi motors connectedin parallel, motorcontrol apparatus arranged to connect said; groups in series and in parallel, fuses in the motor-circuits, and means for automatically cutting out corresponding motors from said groups when one of the fuses blows.

8. In u motor-control system, plurality of groups of motors each co 'mwising a plurahty o motors g-onncctml in parallel, motor- (Mntrol apparatus arranged to connect said" groups in series and in parallel, a fuse in the circuit of cmh-niotor, sw tch mechanismserranged to cut out correspondlng'rriotors from said. groups, and an electroresponsive device 7 111 shunt to each of said fuses arranged to cause the operation of one of said switch mechenisms upon the blowing of a f se associavter'l with one of the inot ors controlled by the letter switch mechanism;

In Witness wl'i'ereot I h eve hereunto set hand this 17th day of'July,-1906.

FRANK E. cAsE. j" Witnesses:

BENJAMIN B. Hr] Jr I'lELEN ()mroma, 

